factorise the following using suitable identity 8 a square - 32
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8(a 2-4)
Using the identity
{x}^{2} - {y}^{2} = (x + y)(x - y)x
2
−y
2
=(x+y)(x−y)
8(a + 2)(a - 2)8(a+2)(a−2)
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